function showenv(e) {
	var somevar = 'div_' + e;
	var ele = document.getElementById(somevar);
	
	
	if(document.getElementById(somevar).style.display == "block") {
    		document.getElementById(somevar).style.display = "none";
		
  	}
	else {
		document.getElementById(somevar).style.display = "block";
		
	}
}	
	